I think you're hitting the nail right on the head Mimi.
Just like I get more motivated to run because of upcoming races (even if I don't plan to win!!), I think she was getting motivated to train because of upcoming competitions. And my understanding of the judges' criteria, based on a few articles I've read to try to understand her sport, is that a woman's body cannot really be a woman's body there: wide shoulders and narrow hips, for example, are valued. I don't think the degree of muscularity (is that even a word??) that is required can be attained by only lifting weights and eating a lot of lean chicken. That's what makes me really mad.
I am quite sure she's going to keep competing, and I'm curious to see how she'll react to her body's changes (or lack thereof) on a different "diet"...
ETA: By the way there is NO DOUBT that she WORKS HARD, supplements or not. She spends hours at the gym lifting and doing cardio.